Indexing devices



United States Patent 3,463,515 INDEXING DEVICES Edward W. Thompson, W. 3614 Rockwell Ave., Spokane, Wash. 99205 Filed Oct. 17, 1966, Ser. No. 587,135 Int. Cl. B421? 21/04 US. Cl. 283-37 Claims ABSTRACT OF THE DISCLOSURE A disc-shape indexing tab having a chord line defining a minor segment to protrude from the edge of a page and a major segment to be adhesively secured to a page with the adhesive terminating spaced from the said chord line and therefore the page edge. Additional lines perpendicular to the chord line extend across the minor segment and form means for aligning successive tabs.

This invention relates to a device for identifying the contents of a page in a book before opening the book.

One object of the invention is to provide a system of indexing a telephone book after it has been printed.

Another object is to provide a system that does not attach to the page at the edge; this eliminates a place for a tear to start in the edge of the page.

Another object is to have the device transparent so the printed matter on the page will not be obstructed. Advertising matter can also be added to the device. A particular advantage is that it provides a time-saving system for locating material in a book, catalog, file or similar set of pages. Another advantage is that this device can be installed in a book by a user of a book with slight effort. To use this device the operator lifts or pulls the appropriate unit to open the book to the desired material.

Other objects and advantages of the invention will appear from the following description of the device illustrated in the accompanying drawing in which:

FIGURE 1 is a plan view of one unit of a series that constitutes a set when the device is in use.

FIGURE 2 is a cross-section of one unit.

The unit is formed from a flat semi-flexible transparent material 1, and coated on the underside with a transparent adhesive 2, which terminates before reaching the edge of the page 4, that is, chord line 7, this leaves area 3 Without adhesive and no shear point. The circumference of 1 is curved or circular to provide no point to start a tear in the page 4 and to ease in the selection of the unit to 3,463,515 Patented Aug. 26, 1969 be lifted. 5, 6 and 7 are lines, solid or dotted, imprinted on 1 to guide the installation of the device. Line 7 at a chord of the arcuate defining edge to coincide with the edge of the page 4 to be identified, and define an outer minor segment and an inner major segment line 5 to coincide with line 6 of the preceding unit and line 6 to coincide with line 5 of the following unit. 8 is the identification of the contents on page 4.

What I claim as new and desire to secure by Letters Patent is:

1. An indexing device for attachment to the page of a book, comprising:

a flat unit; said unit having an arcuate defining edge;

a chord line between a minor segment of said unit,

defined by said arcuate edge and said chord line, and a major segment thereof for superimposition with respect to the edge of a page to which it is to be attached; and

adhesive on one side of the major portion of said unit;

said adhesive terminating spaced from said chord line and within the limits of said arcuate edge whereby to preclude a shear point at the edge of the page.

2. The invention defined in claim 1 and further characterized by said unit and adhesive being transparent.

3. The invention defined in claim 2 and further characterized by the minor segment thereof being provided with selected indicia for facilitating alignment one unit with another unit.

4. The invention defined in claim 3 and further characterized by said indicia comprising a pair of spaced parallel lines perpendicularly arranged with respect to the said chord line and extending from said chord line to said arcuate edge.

5. The invention defined in claim 4 and further characterized by said perpendicular lines being sufliciently spaced to admit the imprint of an identifiable character therebetween.

References Cited UNITED STATES PATENTS 466,530 1/1892 Trask 283-39 957,447 5/1910 Suddick. 1,151,475 8/1915 Kingsley et al. 2,314,578 3/1943 Erb 283-42 FOREIGN PATENTS 14,212 6/ 1910 Great Britain.

LAWRENCE CHARLES, Primary Examiner 

